Split Soul Katana is a powerful fictional cursed weapon from Jujutsu Kaisen that attacks the soul directly instead of the body, making it one of the most dangerous tools in the series.

What is Split Soul Katana?

  • In-universe, it is a broad-bladed katana‑type cursed tool that cuts directly at the target’s soul, bypassing physical toughness and most conventional defenses.
  • It is famous for being used first by Toji Fushiguro and later by Maki Zenin, becoming iconic among Jujutsu Kaisen weapons and fan discussions.

How its ability works

  • The katana ignores physical resistance, slicing through even very tough bodies or materials as if they offer no protection, because the “real” damage happens to the soul underneath.
  • Its full potential is said to be unlocked only by users who can perceive the souls of objects, which lets them “aim” the cut at the spiritual level more precisely.

Role in Jujutsu Kaisen’s story

  • Toji uses the Split Soul Katana to shred powerful cursed spirits and threaten top‑tier sorcerers despite lacking cursed energy, reinforcing his “Sorcerer Killer” reputation.
  • Maki later wields an identical replica, using it to wipe out the Zenin clan and during the Culling Game, though early on she cannot draw out its full power against certain enemies.

Power level and fandom discussion

  • In lore, the katana is treated as extremely valuable (reported as being worth hundreds of millions of yen) and feared because wounds to the soul are hard or sometimes impossible to heal with reverse cursed technique.
  • Forum and subreddit debates often ask whether it is “overpowered,” with many fans noting that while it is very strong, it is not an instant one‑hit win against every opponent and still depends on the user’s skill and matchup.

Real‑world / cosplay angle

  • The weapon’s curved blade and fur‑wrapped guard have inspired many prop builds, blacksmithing videos, and cosplay tutorials that recreate its distinctive design for fans.
  • These props, of course, are nonfunctional replicas meant for display or cosplay, even though they visually echo the intimidating style of the fictional cursed tool.

TL;DR: Split Soul Katana is a standout Jujutsu Kaisen cursed tool that cuts the soul instead of the body, bypasses physical defenses, and is closely associated with Toji and Maki, making it a frequent focus of fan theories, forum threads, and cosplay content.

Information gathered from public forums or data available on the internet and portrayed here.